I should have made myself clearer. My wife doesn't practice much but she is a natural pointer and her Plus-P will be only used at close proximity. What i wanted to avoid was making a ring in the cylinder and was curious if i could use 357 brass and build a practice/competition round. When we shoot plates at our range it's not required that they fall. I've looked in several loading manuals and even found cowboy loads for the 357. What i am asking is, all things being equal, will using the 357 case have any positive or negative effects other than requiring more powder in the case?